Electroresponsive cell



1 06 84 w "CROSS REFERENCE 1,641,564 C. H. ZIERDT E LECTRORESPONS IVE CELL Sept. 6

7 Original Filed Dec. 4. 1922 mvsmon 'z w ATTORNEY -1o tures thereof in the claim.

em mare characters' ,refierto A iirgfiithe plverized' copper oxide with the .0 suitable form V high temperature whereby the' Patents! p e,' 1927.

UNI-TED sTATES PATENT orms.

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My invention relates to theme-sensitive (211s, that is, cells which -depend for their action upon changes in the electri acteristics ofasubstance in response to .B-c in'te'm "rature. Iwilldescri one'form of thermo-sensie -tive cell embodying my inventio and one form of electrical apparatus emg oyingl sfuch e nove aaa cell, and will'then-pointout t In the accompanying drawin Fig. 1 is a-vertical. longitudinal sections view, showigzfi one. form of thermo-sensitive emying'my invention.- Fig. 2 is a. view 5 sho in front elevation the theme-sensitive-ce shownin Fig; 1.

grammatic view sho one rm of also?- ap -parti 1 adapted to use with a o-sensitive-ce my Tinparts ineachofthe severa' mien w Refining first e -1 d 2, the

gtherino-sensitive -cell,' which is designated as a whole by the reference character 5, comtwo .end plates A having outstanding to betwenthese two endplates is an j element B of tbermo-sensitive havi-i cien ahigilli' the temperature co-efi *h hfiwhic' -asEereshowni'sinthe form of a cylindrical button. This element com rises a pulverized theme-sensitive materia 'such on mix =w1 asuxtable as 'um silicate. This element maybe conv'mently manufactured by mcats in re re rtions, reesing the resnlting mi tz r a mo d' of and subjecting themolded mixture to 'a' element is-b'aked" into a solid, rigid mass.-

v This element B is clamped firml between the two endplates A btimeans o a bolt E which pthrough ese end plates and the thermo-sensitive element but is insulated therefrom by an, insulating cylinder 0 and 'twoinsulatin washer'sD.

' In Fig. 8 show' an arrangement of apiaratusadapted or1street series lighting.

plurality of incandescent lamps 12, 11, 10

cal. char-- 8 is a .dia-,

temperature follows: This rise in temperaugswhich serveas a base-for the cell. 'In-' voltage on the ca automatically resto lamps 11, 10 and 9, respectively. The 'operation of the system is as follows: When all of the lamps are lighted, the voltage applied to each cell 5 1s comparativel low and the current which flows throng the cell is also comparatively low so t 0 cell 1s of comparatively high ce. If, however, one of the lamps burns out, substantially the entire voltage of thegenerator -1S momentarily applied to the electrodes of the associated theme-sensitive cell because the current flow in thefcircuit is substantially zero. This results in'an current through the cell, and a point will be reached above which the .heat generated is not all radiated and a "consequent rise-of turedecreasesthe of the copper oxide which further thegcurrent through the cell' and thisaccumulative eflect continues till enough current is based to light the lamps "11,-19,. and us the sistemisprotected .extin' 'gof t e remaining 1am dueto 'ureo f one lamp. When; the eiective, lamp '12 18 replaced by' a lam which; is operable the 5' and consequently the currentthroughvit is d and'the re suiting drop in temperature restores the circnit to its normal condition; The time required for the cell to break down and the voltaa n for operation: may both reg-2'1; by pro rvariation in the structure, ensionsan groportions of the thermo-sensitiveelement 0ne feature-of'my invention is that the theme-sensitive cell 5 is sialf-healingfithat is, it does not-have to be replaced after each failure of the accom anymg lamp but is to its normal condition by the replacement of the lamp.-

Although I have herein shown and described only one form of thermo-sensitive cell embodying my invention, it is understood that various changes and modificasponse to increase of current, and suitable for use as an automatic cut-out in a series lightin system, said cell com rising verize cuprous oxide and so ium sllicate molded together and baked into a solid rigid mass.

In testimony whereof I aflix my signature.

CONRAD H. ZIERDT.

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